isotopic chronometer

isotopic chronometer

[¦ī·sə¦täp·ik krə′näm·əd·ər]
(nucleonics)
A method of determining the age of geological, archeological, or other samples by measuring the amount of a particular radioisotope and of its daughter isotope in a sample.
References in periodicals archive ?
Many craters have been dated merely by stratigraphic evidence, which is less accurate than using an isotopic chronometer.